Computer Networks

Homework #2

In your short but complete answers to the questions below, please show the calculations that support your solution.

As a courtesy to the guest lecturer, answer his questions:
- How does the minimum size of an Ethernet frame influence the maximum length of a passive ether wire?
- If the capacity of the Ethernet increases tenfold, how does it influence the bounds on the network diameter?
- Why is the high load on the Computer Center's network (attributed to the new processor technology) being experienced only recently?
(from Tannenbaum) Imagine that you have trained your St.Bernard "Bernie" to carry a box of three floppy disks, 250,000 bytes each (instead of the traditional cask of brandy). The dog can travel to your side, wherever you may be, at 18km/hr. For what range of distances does Bernie have a higher data rate than a 300bps telephone line?
(from Comer) Find o lower bound on the time it takes to transfer a 5 megabyte file accross a network that operates at : 9600bps, 56Kbps, 10 Mbps, 100 Mbps, and 2.4 Gbps.